TW372387B - Polarity selection circuit for bi-phase stable FPLL - Google Patents
Polarity selection circuit for bi-phase stable FPLLInfo
- Publication number
- TW372387B TW372387B TW083111961A TW83111961A TW372387B TW 372387 B TW372387 B TW 372387B TW 083111961 A TW083111961 A TW 083111961A TW 83111961 A TW83111961 A TW 83111961A TW 372387 B TW372387 B TW 372387B
- Authority
- TW
- Taiwan
- Prior art keywords
- phase
- selection circuit
- phase stable
- data
- polarity selection
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/455—Demodulation-circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Television Systems (AREA)
Abstract
A television receiver includes a synchronous demodulator including a bi-phase stable PLL for controlling sampling of the received signal to produce data. A phase inverter reverses the phase of the data in response to a control signal. Data segment sync characters are recovered with a sync correlation filter that also yields a sign bit indicating polarity. If the sign bit is wrong for a predetermined number of data segment sync characters, a control signal is produced to operate the phase inverter.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17486793A | 1993-12-29 | 1993-12-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW372387B true TW372387B (en) | 1999-10-21 |
Family
ID=22637863
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW083111961A TW372387B (en) | 1993-12-29 | 1994-12-20 | Polarity selection circuit for bi-phase stable FPLL |
TW083111960A TW312886B (en) | 1993-12-29 | 1994-12-20 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW083111960A TW312886B (en) | 1993-12-29 | 1994-12-20 |
Country Status (3)
Country | Link |
---|---|
US (1) | US5621483A (en) |
TW (2) | TW372387B (en) |
WO (1) | WO1995018509A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6545728B1 (en) * | 1994-05-04 | 2003-04-08 | Samsung Electronics Co., Ltd. | Digital television receivers that digitize final I-F signals resulting from triple-conversion |
JP3225837B2 (en) * | 1996-04-19 | 2001-11-05 | 松下電器産業株式会社 | High frequency signal receiver |
JP3503722B2 (en) * | 1996-05-17 | 2004-03-08 | パイオニア株式会社 | Multi-level digital transmission system |
US5949834A (en) * | 1997-01-30 | 1999-09-07 | Zenith Electronics Corporation | VSB symbol sync recovery system |
JP2000115263A (en) * | 1998-09-30 | 2000-04-21 | Matsushita Electric Ind Co Ltd | Digital broadcast demodulator |
US7342614B2 (en) * | 2004-05-20 | 2008-03-11 | Analog Devices, Inc. | Methods and apparatus for tuning signals |
CN107763501A (en) * | 2017-10-31 | 2018-03-06 | 合肥京东方光电科技有限公司 | A kind of backlight module and display device |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3946432A (en) * | 1974-10-10 | 1976-03-23 | Cbs Inc. | Apparatus for digitally encoding a television signal |
US4653069A (en) * | 1975-11-06 | 1987-03-24 | General Electric Company | Spread spectrum correlation receiver |
US4091410A (en) * | 1976-11-08 | 1978-05-23 | Zenith Radio Corporation | Frequency and phase lock loop synchronous detecting system having a pair of phase lock conditions |
NL7903100A (en) * | 1979-04-20 | 1980-10-22 | Philips Nv | DEVICE FOR CHECKING THE SYNCHRONIZATION OF A RECEIVER. |
GB2099262B (en) * | 1981-04-29 | 1984-11-14 | Philips Electronic Associated | Arrangement for checking the synchronisation of a receiver |
US4608604A (en) * | 1983-04-08 | 1986-08-26 | Ampex Corporation | Circuit for reducing AFC offset error |
US4754457A (en) * | 1986-09-03 | 1988-06-28 | Motorola, Inc. | Digital sequence polarity detection with adaptive synchronization |
US4755762A (en) * | 1987-03-12 | 1988-07-05 | Zenith Electronics Corporation | Combined FPLL and PSK data detector |
US5025455A (en) * | 1989-11-30 | 1991-06-18 | The United States Of America As Represented By The Administer, National Aeronautics And Space Administration | Phase ambiguity resolution for offset QPSK modulation systems |
FR2655788B1 (en) * | 1989-12-11 | 1995-08-04 | France Etat | AMPLITUDE MODULATION TRANSMISSION SYSTEM WITH SUPPRESSED CARRIER, MAINTAINING THE POLARITY OF THE TRANSMITTED SIGNAL. |
JPH03217148A (en) * | 1990-01-23 | 1991-09-24 | Nec Corp | Phase inversion detector |
JP2944153B2 (en) * | 1990-07-02 | 1999-08-30 | 日本電気株式会社 | Demodulation reference phase ambiguity removal method |
JP2871140B2 (en) * | 1991-03-20 | 1999-03-17 | 日本電気株式会社 | Demodulation reference phase ambiguity removal system and receiving apparatus therefor |
JP3240155B2 (en) * | 1991-07-18 | 2001-12-17 | 日本放送協会 | Parallel data transmission method and parallel data receiving device |
JP3371913B2 (en) * | 1991-09-03 | 2003-01-27 | ソニー株式会社 | Waveform distortion correction device |
JP3387537B2 (en) * | 1992-12-28 | 2003-03-17 | パイオニア株式会社 | Two-phase PSK demodulation circuit for RDS receiver |
JP2689842B2 (en) * | 1993-02-26 | 1997-12-10 | 日本電気株式会社 | π / 4QPSK clock regenerator |
-
1994
- 1994-12-15 WO PCT/US1994/014463 patent/WO1995018509A1/en active Application Filing
- 1994-12-20 TW TW083111961A patent/TW372387B/en not_active IP Right Cessation
- 1994-12-20 TW TW083111960A patent/TW312886B/zh not_active IP Right Cessation
-
1995
- 1995-07-10 US US08/500,272 patent/US5621483A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
TW312886B (en) | 1997-08-11 |
WO1995018509A1 (en) | 1995-07-06 |
US5621483A (en) | 1997-04-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK4A | Expiration of patent term of an invention patent |